Panasonic KX-FG2452CX Service Manual page 237

C340 R340
K0.01 0
(1)
(2)
(3)
(4)
(5)
(6)
(7)
(8)
(9)
(10)
(11)
(12)
(13)
26 SHCTRL
27 CGPIO4
(14)
28 GND
(15)
29 VCC
(16)
30 SERIAL_LE
25.BGPIO15
(17)
31 SERIAL_CLK
(18)
32 SERIAL_DATA
(19)
33 RXEN
(20)
34 TXEN
(21)
35 RXGAIN
(22)
36 RXDATA
37 DGPIO10
(23)
38 CHG_DET
39 OSC_BUF
IC201
(24)
40 EEPROM_DET
41 DGPIO6
42 DGPIO5
43 DGPIO4
(25)
44 LCD_DB7
50.LCD_RESET
(26)
45 LCD_DB6
(27)
46 LCD_DB5
(28)
47 LCD_DB4
(29)
48 GND
(30)
49 VCC
(31)
50
(32)
(33)
(34)
(35)
(36)
(37)
(38)
(39)
(40)
(41)
(42)
(43)
(44)
R401 100
(45)
R242 1K
R241 10K
3.0V
(46)
(47)
2.6V
R225
1K
X201
13.824MHz
R201 NC
SPOUTN 100
VCCPA 99
HSSPOUTP 98
HSSPOUTN 97
HEADSET_DET 96
1.GNDPA
95
HEADSET_MIN
R333
94
VCCA
93
GNDA
R317
92
MIC_PWR
91
MIN
C303
90
MIP
89
VREF
88
IBAT
87
PDN
86
GND
85
EEPROM_WP
84
UART_RX
83
UART_TX
82
EEPROM_SDA
76.KIN_3
EEPROM_SCL 81
CHG_CTRL 80
AGPIO0 79
KIN_5 78
KIN_4 77
76
TCK
TMS
TDI
TDO
Q243
R243
270K
2.6V
2.6V REG
IC371
DC/DC_OUT
R331
10K
Q331
RST
R332
NC
HEADSET-DET
C333 K0.01
1K
R208 10
100
C208 10
1.0
C304
NC
R205 NC
24ms
R206 NC
R207 NC
Power ON
(Reset)
R209 100K
RX
TX
UART
Q221
R376
2.2M
L373
47uH
BATTP
D373
+
IC373
D
BATTM
G
1 5
VOUT EXT
-
2 S
Q373
VDD
3 4
ON/OFF VSS
DC/DC
IC374
R227 220K
OUT 1 2 VDD
3 4
NC GND
2.0V RESET
237
HEADSET_JACK
L331
1
L332
2
3
4
L334
5
CN331
R323
18
R324
18
R325
NC
C314
R314
2.2K K0.018
C315
R315
K0.018
2.2K
R318
2.2K
SP-Phone
L326
L327
SP phone RX
(MIC Mute: ON)
1.8Vp-p/8
(Vol. MAX)
CHARGE_DET
POWERDOWN
IC221
Q231
R222 C222
OUT VDD
1 2
22K K0.1
3 4
NC GND
2.2V RESET
2.3~2.9V
R368 1K
R367 NC
R366 NC
D361 Q361
Q362
NC: No Components
KX-FG2452CX : Handset Board_Main
KX-FG2452CX
TEST SIGNAL
FREQUENCY:1KHz
Headset TX
IN
-37dBm/600
50mVp-p
GND
MIC1
MIC2
SP2
SP1
Headset RX
170mVp-p/150
(Vol. MAX)
HANDSET SP
SPP
SPM
Handset RX
(MIC Mute: ON)
590mVp-p/150
(Vol. MAX)
MICM
MIC
MICP
Handset TX
-33dBm/600 IN
88mVp-p
SP phone TX
-43dBm/600 IN
30mVp-p
R231
22K
R230
NC
CHG1
L351
NC
CHG2
L352
NC
Q363
R364
NC